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The pin Qh4-Qf6-Ke7 leaded me to discover that if Nf5+, exf5 was forced else the queen is hanging.. Then, I tried to drive off the King of his protection duty. The Queen is dead. How?
1. Nf5+! exf5
2. Rfe1+ (not the other, we will see why later) Ne5
3. Rxe5+ (opening the d-file) dxe5
4. Rxd7+ (trying to decoy the King) Ke6 and then the decisive
5. Rd6+ means curtains for the queen. The end is easy.
5… Kxd6
6. Qxf6+ and next 7.Qxh8
The material balance is broken, and White wins.
After 1.Nf5+ !, black will lose his queen. If the knight is taken, then white will play Re1+, and the black king will be forced to abandon his defense of the queen.
A common chess motif, one I have encountered numerous times over the years in various forms from both sides of the positions. The black queen has a single protector- her king, and kings can be forced to give up this guard with checks from other pieces. I spotted this tactic almost instantly:
1. Nf5 ef5
The queen is pinned and if the king moves to d8, e8, or f8, white wins simply with Qf6. However, taking at f5 only delays the inevitable, though there is a wrinkle that took me a few minutes to work out to my satisfaction:
2. Rfe1!
The key move. It might appear that it won’t matter which rook is used, but that isn’t so. You will see why Rde1 fails to win when we get to move 4 below. Continuing from move 2 above:
2. …..Ne5 (or give up queen)
3. Re5! de5 (or give up queen)
4. Rd7
If white had played 2.Rde1, then this capture and check at d7 would not have been possible, and black would have been able to defend successfully since white’s own queen is unprotected. White would regain his piece but would be down a pawn when the smoke clears. Continuing from move 4 above:
4. …..Kd7 (Ke6 5.Rd6 Kd6 6.Qf6)
5. Qf6 with an easy win.
1Nf5ch pxn 2R(f)e1ch ne5
3 Rxnch pxn 4Rxrch black Q is lost
1. Nf5+ looks great! 1… exf5 2. Rfe1+ Ne5 3. Qxf3 Kxf3 4. fxe5+ +-
1.Nf5+ e6xf5 2.R(f)e1+ Ne5 3.Rxe5+ d6xe5 4.Rxd7 Ke6 5.Rd6+ Kxd6
6.Qxf6+ Kc7 7.Qe5+ Kd7 8.Qxh8 Bc8
etc.
1.Nf5+ exf5
2.Rfe1+ Ne5
3.Rxe5+ dxe5
4.Rxd7+ Kxd7
5.Qxf6
should be an easy with for white from here.
1.Nf5+